Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a62022ab1ae0b6f2f4669e3450d9c111dc7bcaa4037aebd68b417bc10b9e4d16:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
   --> 1e3c78c6d580273b.LNVCT:218:63